Comment by Tzk

Yes it’s doable at home, even with fairly primitive tools. You need several chemicals and (if you wish) colored dye.

Anodizing works as follows:

1. Take the MacBook apart

2. Clean it

3. Chemical bath to remove old anodized layer

4. Clean it again

5. Chemical bath with power supply attached. applied voltage+current and duration will determine hardness and thickness of the anodized layer.

6. Clean it

7. Dye it.

8. Seal the dye in a hot water bath.

It’s fairly straight forward to do.